class Test2 {
    private int aa = 10;
}

public class Test {
    private int a = 10;
    private static int b = 20;
    private static Test2 t2 = new Test2();

    public static void main(String[] args) {
        Test t = new Test();
    }
}

class Test {
    Test x;
}

Test a = new Test();
Test b = new Test();

a.x = b;
b.x = a;

a = null;
b = null;


